Use extensions socket permission for TCP/UDP socket APIs in Pepper

ppapi/shared_impl/private/net_address_private_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/shared_impl/private/net_address_private_impl.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <winsock2.h>
 #include <ws2tcpip.h>
@@ skipping 263 matching lines @@
 
   if (include_port)
     base::StringAppendF(&description, "]:%u", net_addr->port);
 
   return description;
 }
 
 PP_Var Describe(PP_Module /*module*/,
                 const struct PP_NetAddress_Private* addr,
                 PP_Bool include_port) {
-  const NetAddress* net_addr = ToNetAddress(addr);
-  if (!IsValid(net_addr))
+  std::string str = NetAddressPrivateImpl::DescribeNetAddress(
+      *addr, PP_ToBool(include_port));
+  if (str.empty())
     return PP_MakeUndefined();
-
-  std::string description;
-  if (net_addr->is_ipv6) {
-    description = ConvertIPv6AddressToString(net_addr,
-                                             PP_ToBool(include_port));
-  } else {
-    description = ConvertIPv4AddressToString(net_addr,
-                                             PP_ToBool(include_port));
-  }
-  return StringVar::StringToPPVar(description);
+  return StringVar::StringToPPVar(str);
 }
 
 PP_Bool ReplacePort(const struct PP_NetAddress_Private* src_addr,
                     uint16_t port,
                     struct PP_NetAddress_Private* dest_addr) {
   const NetAddress* src_net_addr = ToNetAddress(src_addr);
   if (!IsValid(src_net_addr) || !dest_addr)
     return PP_FALSE;
   dest_addr->size = sizeof(NetAddress);  // make sure 'size' is valid.
   NetAddress* dest_net_addr = ToNetAddress(dest_addr);
@@ skipping 184 matching lines @@
     return false;
 
   *port = net_addr->port;
   size_t address_size = GetAddressSize(net_addr);
   address->assign(&net_addr->address[0], &net_addr->address[address_size]);
 
   return true;
 }
 #endif  // !defined(OS_NACL)
 
+// static
+std::string NetAddressPrivateImpl::DescribeNetAddress(
+    const PP_NetAddress_Private& addr,
+    bool include_port) {
+  const NetAddress* net_addr = ToNetAddress(&addr);
+  if (!IsValid(net_addr))
+    return std::string();
+
+  // On Windows, |NetAddressToString()| doesn't work in the sandbox. On Mac,
+  // the output isn't consistent with RFC 5952, at least on Mac OS 10.6:
+  // |getnameinfo()| collapses length-one runs of zeros (and also doesn't
+  // display the scope).
+  if (net_addr->is_ipv6)
+    return ConvertIPv6AddressToString(net_addr, include_port);
+  return ConvertIPv4AddressToString(net_addr, include_port);
+}
+
 }  // namespace ppapi